Marking roll



Dec. l5, 1931. J. k. VANATTA 1,837,084

MARKING ROLL Filed Nov. 14, 1930 2 Sheets-Sheet l Dec. l5,- 1931. J. K.VANATTA 1,837,034

mKING ROLL I Filed Nov. 14, 1930 2 Sheets-Sheet 2 [7l/ED DH 2 V Y lPatented Dec.' 15, 1931 t `UNITED STATES PATENT oFF-lcs i JEAN' K.yYANATTA, 0F PORT EDWARDS, WI

SCONSDT, ASSIGNOB TO NEKOOSA-EDWARDS PAPER COMPANY, or roar EDWARDS,wrscoNsIN, A CORPORATION or WISCONSIN MARKING ROLL application ledNovember 14, 1980. Serial No. 495,594.

The present invention relates to marking rolls used in paper makingmachinery for watermarking paper, and more particularly to an improvedconstruction of such marking rolls of the type having an outer layer ofresilient material bearing an engraved marking design.

In practice two distinct types of marking rolls are in use. In the onetype the marking roll comprises a metal roll upn the surface of whichare secured metal plates or stereotypes bearing the design to bereproduced upon the paper. It has been the practice to wrap the surfaceof the marking roll with one or more layers of muslin-like fabric,I`Lthrough which-the impression of the type or plate is delivered; This isobjectionable because the fabric is speedily worn out or torn so that itis necessary to frequently rewind or rewrap the rolls.

Another type of marking roll used in paper making machines comprises aroll upon the periphery of which is secured a layer of resilientmaterial having an engraved marking surface. bands of soft rubber towhich bands of hard rubber bearing the engraved design are vulcanized.Heretofore in the making of such rolls it has been found impossible tovulcanize or Otherwise secure the soft rubber onto the surface of the'metal core so that the soft rubber base will not slip or creep underthe strain .or force created when effecting the impres-y` sion on thepaper web. v I

It is a particularl object of the present invention to Overcome suchdifficulty by secur-.

ing the soft cushioning layer directly to the metal roll by a process ofcenienting.

This 4'and further objects of this invention will be apparent from thedisclosures from the specication and the accompanying draw ings; Thisinvention (in a preferred form) is illustrated in the drawings andhereinafter more fully described.

@n the drawings: f Figure 1 is a side elevational view partly in sectionof a roll embodying my invention. Figure 2 is a sectional view taken onIthe line II-II of Figure 1.

Such rolls usually comprise endless soft rubber layer 13. The

vided wcitha suitable engraved design such as i Figure 3 is a sideelevational view partly in section of a modified form of roll.

Figure 4 is a sectional view taken on the line IV -IV of Figure 3.-

Figure 5 is a side elevational view of a small size roll embodying thepresent invention.

Figure 6 is a side elevational view partly in section of anothermodified form of roll.

Figure Tis a longitudinal sectional view of the roll shown in Figure 6,and showing av modified form of end structure.

Figure 8 is a sectional view taken on the line VIII-VIII of Figure 6.

As shown on the drawings: The markin roll 10 comprises a metal shell orcloser?I cylinder 11 provided with pressed in trunnions 12 forlsupporting the roll. The metal cylinder 11 is covered with a full lengthlayer of soft cushioning rubberl 1,3 fo g a continuous sleeve around thecylinder.

The sor't rubber layer 13 is cemented to the metal cylinder 10 by aprocess ofcementing lwhich consists in treating the rubber and metalsurfaces which are to be joined together with an application' of arubber cement such as to a heating period. In this process, steel andseveral other metals can be used and there is no restriction as tothedensity orhardness of the rubber used. Theadhesion is such that therewill .be actuallyrno creeping of the rubber layer Vunder the heavieststrain, `the ie-l sistance toseparation atthe joint being over 500`lbs.per sq. in.

A hard rubber sleeve 14 is vulcanized to the shown at 15. c j

In the modification shown in Figures 3 and 4 marking roll16 comprises ashell or closed cylinder 17 provided with pressed in trunnions 18 forsupporting the roll. The roll 16 is provided with a number of markingsections sleeve 14 is pro.-l

' 19, each section comprising a metal cylinder 20 to which is cemented alayer of soft rubber 21 in the manner described above. A hard i rubberlayer or sleeve 22 is vulcanized to the soft rubber sleeve and forms themarking surface of the section. f

The sections 19 are splined to the metal shell 17 as shown at 23. Theinside diameter of the section is substantially the same as the ex mternal diameter of the cylinder orvshell to insure a snug fit. f Themetal shell or cylinder is provided at its ends with screw threads 24for receiving nuts 25 to hold the sections in place thereon. l In themodification shown in vFigures 6, 7 and 8 the marking roll 27 comprisesa closed cylinder 28 provided with pressed in trunnions 29 forsupporting the roll. The roll 28 is provided with a single .sleeve ormarking section 30 comprising a metal cylinder 31 to which is cemented alayer of soft rubber 32 in the manner previously described. The hardrubber layer or sleeve 33 isY vulcanized tu the soft rubber sleeve andforms the marking sur- ,25 face of the roll.

The inside diameter of the sleeve 30 is substantially the same as theexternal diameter of the cylinder 28 to insure a snug fit. The shell maybe splined to the cylinder as shown at so 34 in Figure 8.

The cylinder 28 has a reduced en rtion 35 at one end thereof. A collar36, t e outside diameter of which is greater than the outside diameterof the cylinder, is fitted onto 35 the reduced end of the cylinder. `Thereduced end of the cylinder is threaded as shown at 37 to receive one ormore nuts 38.

` The otherend of the cylinder 28 may be provided with a similar reducedportion on m which is mounted a collar 36 and nut 38 similar in allrespects to the previously described end construction.

In vthe alternate construction ,ShOWIl in; Figure 7 one endof thecylinder isprovided .z5 with an integral shoulder 30-39 against rwhichthe sleeve 30 abuts. Thesleeve 30 is forced against the shoulderl39bymeans of collar 36 and nut 38 as' reviously described. In Figure 5 thereis s own a marking roll :.0 26 which is formed similar to that shown inFigure 1. The marking roll is of smaller size and is used where thewatermark is to be imprinted on a narrow section of the paper. The smallsize roll shown on Figure,5 could also be constructed in the mannerofthe modi- A ication shown in Figures 6, 7 and 8.

' In practice the marking roll is located in the paper making machine ata suitable point between the couch roll and the calenders of 60 themachine. The web passes between the. )marking roll and a hard smoothsurfacesuch as that of the'drying cylinder and the design of the markingroll is impressed on the web. The cushioning roll is composed of rubber0? having a penetration of 55 to 60 on' a Pusey and Jones Plastometer.The outer layer has a penetration of 9 to 11 units on the same scale. i

The roll may be formed as shown in Figure 1 or with the number ofmarking sections as shown in Figure 3, the advantage of the latter beingthat ifvparts of the design are in any way damaged or altered, or if onesection wears down more'than another section, a new section can be addedwithout resurfacing the roll or substituting anew ro1l.` Also, only asmall part of the roll body could be provided with engraved sleeves torun small orders or several designs could be run on different orderscovering the samegrade of paper.

In using the modified construction of Figures 6, 7 and 8 only one rollis needed for each paper machine, and a series of sleeves havingdiierentmarks could be kept in stock` which could be readily removed or appliedas the user desired.

As shown in Figure 4, the spline prevents relative movement ofthe/marking sections, however, it is contemplated thatthe sections may1be provided with recesses and locked toget er by dowel pins toaccomplish this purpose.

In the use of marking rolls of the metal face type, it has been foundnecessary to Wrap the rolls with muslin in order to provide thenecessary resiliency. In the rubber surface marking roll, a soft. rubberlayer is provided underneath the hard rubber sleeve to provideresiliency. However, it has heretofore been-impossible to secure thesoft rubber to the metal. Consequently, it has heretofore been foundnecessary to use' one or more layers of hardrubber between the metalcylinder and the soft rubber layer. B secur ing the soft rubber to themetal she inthe manner herein disclosed, the use of other layers isobviated and a cheaper and better marking roll is produced. c

l I am aware that many changes may' be made and numerous details ofconstruction may be varied through a wide ran without departing from theprinciples of t 's invention, and I therefore do not purpose limitingthe patent anted' hereon otherwise than necessitated y the prior art.

I claimas my invention:

1. A marking roll formarking paper coinprisinr a'metal bod a layer ofsoft rubbert ereto and inca able of directly adher' separation there omby a force of' ess than 500 pounds per square inch, and an outer layerofhard rubber securely vulcanized to said soft rubber layer and havingindicia thereon for marking paper.

2. A marking roll for marking aper comprising a metal shell, a layer ofsog between 5.5 and 60 'density securely cemented directly to said metalshell and an outer layer of hard rubber Vof between 9 'and 11 densityrubber of vulcanized directly to said soft rubber layer and havingintegral niarking indicia. on its outer surface.

' In testimony whereof I have hereunto subi -5 scribed mv name at PortEdwards, Wood County, Wisconsin. l

' 'l kJEAN K. VANATTA.

MII

